Casing for lamp-sockets, pendant-switches, and the like.



' C; J. KLEIN.

) CASING FOR LAMP SOCKETS; PENDANT SWITCHES, AND THE LIK.E.. APPLICATiONFILED MAR. 17'. m3.

I Patented Aug. 31, 1915.

2 SHEETS-SHEET I.

.7 v c. J. KLEIN.

CASING FOR LAMP SOCKETS, PENDANT SWITCHES, AND THE LIKE.. APPLI CATIONFILED MAR\17|l913.

1,151,799: Patented Aug. 31, 1915.

2 SHEETS-SHEET 2.

OFFE

CHARLES J. KLEIISI', OF MILWAUKEE, WISCONSIN.

" Application filed March 17,

To all 107mm it may concern Be it known that 1, CHARLES J. KLEIN, a

citizen of the United States, residing at Milwaukee, in the county ofMilwaukee and I panying drawings.

State of lVisconsin, have invented new and useful Improvements inCasings-for Lamp- S'ockets, Pendant-Switches, and the like, of which thefollowing is a full, clear, concise, and exact description, referencebeing had to the accompanying drawing, forming a part of this.specification.

My invention relates to casings for lamp sockets, pendant switches andthe like.

It has among its objects to provide an improved and simplified two-partcasing wherein when the parts of the same are brought together they arelocked against relative rotation and longitudinal separation but are atthe same time readily separable longitudinally when desired.

Otheg objects and advantages of my improvem'nt will hereinafter appear.

In order that my invention may be clearly and fully disclosed, I haveillustrated sev-. eral embodiments of the same in the accome Figure .1is a side elevation of an assembled casing; Fig. is a partiallongitudinal sectional view if the same with a cap positioned above theshell; Fig. 3 is a sectional view of the cap on line 33'of Fig. 2; Fig.I 4. is a detail of the catch on the shell; Fig. 5 is a partialsectional, view showing the cap in position; Fig 6 is a sectional Viewon line 66 of Fig. 7 showing the modified construction; F ig. 7 is aside/elevation of the construction shown in Fig.- 6; Fig. 8 is a detailview of a modified foriii of catch; Fig. 9 is a partial sectional viewof the construction shown in Fig' 8; Fig. '10 is a bottom plan view of amodified form of'cap'i Fig. 11 is a detail view'of-a shell adapted-to beused with-theconstruction shownin Fig. 10. Fig. 12 is a side elevationof amodified form of shell adapted to use withla construction shown inFig. 10 Fig. 13 is a sectional view on line 13-13 of Fig. 12.

The casing shown comprises a cap 1 and 2 a shell Qprovided withengagingmembers,

hereinafter described, forloclring the parts together. l in theconstruction shown in Figs. 1 to' 5,

' the rim of the cap 1 is expanded angularly as shown at 3 and upon itsedge an inwardly extending flange 4 fis v provided adapted to cotiperatewith catches onthe shell 2, herein- Specification of Letters Patent.

Patented Aug. 31, 1915.

1913. Serial No. 754,806.

after described, to lock the parts together.

vThis flange is protruded substantially atv right angles to the axis ofthe cap and is provided with a. plurality of substantially rectangularshaped notches,or slots 5 disposed through its edge in a regular spacedrelation. The shell 2 is substantially cylindrical and resilient at itsupper end, being provided with one or more longitudinally extendingslots 6 to permit the side walls 7 of. the same to be compressed. Theseside walls carry one or more suitable catches 8 adapted to :bereceivedin the-slots 5 in the flange 4. In the drawings I have shown the catches8 to be formed integral with the member'2 and punched out therefrom soas to extend substantially at right angles to the periphery thereof. Ina preferred form the upper edge of each of these catches 8 is tapereddownward as shownat 9 in Fig. -l and is provided with a horizontallydistapered, portion and atright angles to the elongated body portion ofthe catch. T0 attach the'members 1 and 2, the catches 8- in the casing-2are made to register with certain of theslots 5 in the cap flange 4.Upon a longitudinal movement of either the cap oshell toward the otherand a compression posed edge or ledge 10' at the end of the portions 10spring outward so that they rest upon tl1e ,horiziontal portion of theflange adjacent the inner end of the slots 5 and immediately back ofthe'saine, thus providing a positive lock fdr preventing longitudinalseparation of the members 1 and 2. At the same time the verticallyextending body portion of the catches 8 beneath the horizontallydisposed ledges 10 are received in the slots 5 and engage the side wallsof the same to positively lock the parts against relative rotation. Whenit'is desired to separate the members 1 and 2, however, by simplypressing the resilient upper end of the member 2 at points beneath thecatches, the catches are moved toward each other to cause the ledges 10to again register with the slots 5, whereupon the parts may be readilysepa-f rated by-a longitudinal movement. I

' slots in the member 2 and the projections 12 are provided with roundedupper edges l t instead of a tapered portion. This construction isadapted to use with a cap having a flange of the same construction asshown in Fig. 3. -When it is desired to attach the member 2 to the cap,the lips 11 are forced inward and the projections or struck-out portions12 are brought in registry with the slots 5. The members 1 and 2 arethen brought together causing the projection 12 to enter in the slots 5and by their engagement with the side walls of the same act as apositive means for preventing relative rotation. Due to the resiliencyof the shell when the compression upon the end of the same is removed,the lips 11 spring outward and their under surfaces restupon the uppersurface of the horizontal flange 4: and thus provide a positive lockagainst accidental longitudinal separation.

In F igs. 8 and 9 is shown a further modified construction which islikewise adapted to be used with a cap of the construction shown in Fig.In this construction the member 2 is provided with a plurality ofvertically extending struck-out portions 15,

tapering toward the wall of the member 2 at their upper ends as shown at16, and of greater width at their lower end where they are provided witha horizontally disposed edge 17 These catches 15 are disposed parallelto each other in pairs on one or both sides of the resilient end of themember 2 and are preferably strucleupfrom the metal thereof on oppositesides of a substantially rectangular shaped opening 18 formed therein.Cooperating with these catches 15 is another catch carried by a memberinclosed within the member 2. In 41 preferred form this catch 19 isformed of a single sheet of metal having its inner end embedded in theinsulating base 20 of a switch mechanism or The outer end of this catch19 other device. is provided with a notch2l in its lower edge adapted tofit over the wall of the member 2 between the catches 15 and is likewiseprovided with an elongated downwardly extending portion 22 and acut-away portion 23 above the same. It is to be noted that the elongatedportion 22 of the catch- 19 extends below the horizontal edges 17 of thecatches 15. To attach the member 2 to a cap of the construction shown inFig. 3, the catches 19 are brought into registry withthe slots 5 thereinand the resilient sides of the member 2 are compressed at points beneaththe.

This compression forces the catches 15. catches 15 inward enabling thetapered edges of the same to pass the portions of the flange 4 betweenthe slots 5. WVhen the pressure upon the sides of the member 2 isremoved,

due to the resiliency of the end of this meIn-f. I

her, the catches 15 immediately spring outward over the flange 4t andtheir horizontally disposed portions 17 rest upon the hori zont'al uppersurfaces of the flange, thus providing positive means for lockingtheparts against'longitudinal separation. At

the same time the lower end of the member further modified form of myinvention. In

this construction the member 1 is provided] with slots in its flangedisposed in the same manner as the slots shown in Fig. 3 but the slotsare wider. The catch adapted to co .operate with these slots is shownindetail in Fig. 11 and comprises a resilient member 24 integral withthe. casing member 2 and ex tending longitudinally thereof, punched outtherefrom along parallel longitudinally disposed slits '25. Near itsupper end this resilient member or tongue 24 is belng provided with ahorizontally disposed por-.'.

tion or ledge 26 extending'substantially at right angles to its bodyportion and above this ledge 26 the upper end of the member 2-1 ispreferably bent ihward at an angle of. j i 45 degrees as shown at 27 toform a catch.

To look the members 1 and 2 together when I this form of catch is used,the upper ends 27 of the catches 24 are broughtdn registry with theslots 5 of the flange 4. U on continuedlongitudinal mqyement of t eparts toward each other, the portion 27 of there silient tongue or catch'24 engages the'i endgi wall of the slot and yields inwardlyun'tiltheledge 26 is opposite the horizontal sur-. face of the flange at'the backof the slot,"

Due to their resilient construction thec'atches 24 then spring outwardand the horizontal lit ledge 26 on the catches rests firmlyup'on' thehorizontal surface of the flange at the ends of the slots and thusestablishes a positive" means for preventing accidental longitudi";

na'l separatlon of the parts.' At the same time the verticallyextending'edges of the member 24 engage the side walls of the slots 5and thus provide a positive lock preventin relative rotation of theparts.

In Figs. 12 and 13 Ihave illustrated anportion in radial aline'ment withsaid recess, said PIOJQCUOIL havlng a portion of reduced size to entersaid recess.

10. In casings for incandescentlamp sockets, in combination, a caphaving an inturned marginal portion provided with a radial notch, aresihent shellihaving. one

end adapted td'enter said cap, and a pr0jec- 1 tion associated with saidshell comprising vertical and horiiontal shoulders adapted to I engagewith the face of said inturned por- I CHARLES J. KLEIN,

Witnesses-z LEONARD A. WATSON, FRANK H. HUBBARD.

